6.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Fenghua Yu <fenghua.yu@xxxxxxxxx> [ Upstream commit 62b41b656666d2d35890124df5ef0881fe6d6769 ] WQ Advanced Translation Service (ATS) can be controlled only when WQ ATS is supported. The sysfs ATS disable knob should be visible only when the features is supported. Signed-off-by: Fenghua Yu <fenghua.yu@xxxxxxxxx> Reviewed-by: Dave Jiang <dave.jiang@xxxxxxxxx> Link: https://lore.kernel.org/r/20230712174436.3435088-2-fenghua.yu@xxxxxxxxx Signed-off-by: Vinod Koul <vkoul@xxxxxxxxxx> Stable-dep-of: 0056a7f07b0a ("dmaengine: idxd: Allow ATS disable update only for configurable devices") Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/dma/idxd/sysfs.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c index 36a30957ac9a3..d16c16445c4f9 100644 --- a/drivers/dma/idxd/sysfs.c +++ b/drivers/dma/idxd/sysfs.c @@ -1088,16 +1088,12 @@ static ssize_t wq_ats_disable_store(struct device *dev, struct device_attribute const char *buf, size_t count) { struct idxd_wq *wq = confdev_to_wq(dev); - struct idxd_device *idxd = wq->idxd; bool ats_dis; int rc; if (wq->state != IDXD_WQ_DISABLED) return -EPERM; - if (!idxd->hw.wq_cap.wq_ats_support) - return -EOPNOTSUPP; - rc = kstrtobool(buf, &ats_dis); if (rc < 0) return rc; @@ -1316,6 +1312,9 @@ static umode_t idxd_wq_attr_visible(struct kobject *kobj, if (idxd_wq_attr_invisible(prs_disable, wq_prs_support, attr, idxd)) return 0; + if (idxd_wq_attr_invisible(ats_disable, wq_ats_support, attr, idxd)) + return 0; + return attr->mode; } -- 2.40.1
